class AccountSerializer(serializers.ModelSerializer):

    class Meta:

        # 模型名称

        model = User

        # 序列化返回的字段

        fields = ('id', 'account_name', 'users', 'created')

        # 这个字段不返回

        exclude = ('users',)

        # 显示的深度

        depth = 1

        # 默认只读,不接受用户修改  跟字段设置的read_only=True效果一样

        read_only_fields = ('account_name',)